Real time Noise Pollution Alert

 

Story:

Things used in this project:

Hardware Components:

1.     
2. Sound Detection Sensor Module.

Software Apps and Online Services:

1. Telegram Messaging App.

Hardware setup:

Step 1]Connect the sound sensor with the Bolt WiFi module as per the following:

1. A0 Pin (Bolt IoT Wi-Fi Module- GPIO) is connected to A0 Pin (Sound Sensor).
2. GND Pin (Bolt IoT Wi-Fi Module) is connected to GND Pin (Sound Sensor).
3. 5V Pin (Bolt IoT Wi-Fi Module) is connected to “+” Pin (Sound Sensor).

Step 2] Power up the Bolt WiFi module using the USB cable.

Software setup:

Creating a Telegram Channel:

• Open your Telegram App and swipe left open the Main Menu and tap on the feature New Channel.
• Give a suitable name to the channel and provide description to it.
• Set the channel as Public Channel and provide a permanent link to it by giving a suitable name. Note: Space between words is not allowed.
• Now we need to create a Telegram Bot.

Creating a Telegram Bot:

• After creating the Telegram Channel come back to the home page of the Telegram and search for the BotFather in the search menu.
• After opening the BotFather enter the command /start to create the bot.
• To create a new bot enter the command /newbot and give a suitable name to the bot.
• Secondly we need to give the username to the bot created it should be ending with the bot e.g. usernamebot
• Now a API Key will get generated store that API Key as it have to be used in the coding.

Linking the Telegram Channel and Telegram Bot:

• Now that we have created both Telegram Channel and Telegram Bot next we need to link them both together.
• To do that open your channel and tap on the channel name and then click on the Administrator button and search for the bot name you have created.

Coding:

To make and send alerting message facility via Telegram, we need to understand the skeleton of the coding. The whole program has two parts namely:

1. Configuration code:  It consist all the backend details of Bolt IoT Wi-Fi Module and the Telegram.
2. Main code: It consists of the core coding of the facility.

To create above two mention files, executive the following steps:

Open the Digital Ocean Ubuntu server   (For Windows /Mac Operating System) or open the terminal in the Ubuntu Operating System.

Step 1] We need to create a directory (folder) to store the two coding files mentioned above. To create a directory named alert, type out the following command

sudo mkdir alert

Step 2] Next we have to enter the directory that we just created. To enter the directory named alert type out the following command:

cd alert

Step 3] After entering the folder first we need to create the configuration python file which will hold all the backend details of the Bolt IoT Wi-Fi Module and Telegram.

To create the configuration python file in the folder which was created first type out the following command for creating the file with extension .py;

sudo nano configuration.py

Step 4] After the above mentioned file enter the following data into the file. Make sure that you add the updated Bolt API key, device id and Telegram details:

"""Configurations for Telegram alert message"""
BOLT_API_KEY = "XXXXXXXXX" #This is your Bolt cloud API
Key.
DEVICE_ID = "XXXXXXXXX" #This is the ID number of your
Bolt device.

TELEGRAM_CHAT_ID = "@XXXXXXXXX" #This is the channel ID of the
channel created in the
Telegram. Paste after @.

TELEGRAM_BOT_ID = "botXXXXXXXXX" #This is the bot ID of the bot
created in the Telegram. Paste
after bot.

THRESHOLD = 80 #Threshold beyond which the
alert should be sent.

Step 5] Save the file by clicking "ctrl+x" and press enter. Next create another file which will include the main coding of the facility.

sudo nano alert.py

Step 6] Enter the following code into the newly created file:

import requests                  #for making HTTP requests
import json               	#library for handling JSON data
import time               	#module for sleep operation
from boltiot import Bolt    	#importing Bolt from boltiot
                                  module
import configuration             #configuration file
mybolt = Bolt(configuration.BOLT_API_KEY,configuration.DEVICE_ID)
def get_sound_sensor_value_from_pin(pin):
try:
response = mybolt.analogRead(pin)
data = json.loads(response)
      if data["success"] != 1:
            print("Request not successful")
            print("This is the response->", data)
            return -999
    	sound_sensor_value = int(data["value"])
    	return sound_sensor_value
except Exception as e:
print("Something went wrong when returning the sensor value")
     	print(e)
     return -999
def send_telegram_message(message):
url = "https://api.telegram.org/" + configuration.TELEGRAM_BOT_ID + "/sendMessage"
data = {
        "chat_id": configuration.TELEGRAM_CHAT_ID,
        "text": message
}
try:
        response = requests.request(
            "GET",
            url,
            params = data
        )
        print("This is the Telegram response")
        print(response.text)
        telegram_data = json.loads(response.text)
return telegram_data["OK"]
    except Exception as e:
print("An error occurred in sending the alert message via Telegram")
        print(e)
        return False
while True:
    #Step 1
    sound_sensor_value = get_sound_sensor_value_from_pin("A0")    
    print("The current sensor reading is:", sound_sensor_value)
    #Step 2
    if sound_sensor_value == -999:
	print("Request was unsuccessful. Skipping.")
     time.sleep(10)
    	continue
     #Step 3
    if sound_sensor_value >= configuration.THRESHOLD:
print("Sensor value has exceeded threshold")
message = "Alert! Noise disturbance around the XYZ Hospital. Random and unidentified sound intensity has crossed " + str(configuration.THRESHOLD) + str(“dB”) + \
“The current sound sensor reading is ” + str(sound_sensor_value) + str(“dB”) + str(“To, The Police Incharge, Immediate action required. Thankyou.”)
telegram_status = send_telegram_message(message)
print("This is the Telegram status:", telegram_status)
# Step 4
time.sleep(50)	#Time interval to get the status update.

Step 7] Exit the code editor using "ctrl+x" and then run the code that you have written using the following command.

sudo python3 alert.py

Conclusion:

An alert message is expected on your Telegram channel. Possible output as follows also the alert message can be customised as per the requirement:

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